Sale Badge percentage not shown issue compatibility for TopDeal theme

Resolve the issue where sale badge percentages do not display correctly in the TopDeal theme.

add_action('plugins_loaded', function() {
    if (!function_exists('sw_label_sales')) {
        function sw_label_sales(){
    		global $product, $post;
    		$product_type = ( sw_woocommerce_version_check( '3.0' ) ) ?  : $product->product_type;
    		if( $product_type != 'variable' ) {
    			$forginal_price 	= get_post_meta( $post->ID, '_regular_price', true );	
    			$fsale_price 		= get_post_meta( $post->ID, '_sale_price', true );
    			
    			// Woo Discount Rules: Set initial and discounted price
    			$discount = apply_filters('advanced_woo_discount_rules_get_product_discount_price_from_custom_price', false, $product, 1, 0, 'all', true, false);
                if ($discount !== false && is_array($discount) && isset($discount['initial_price']) && isset($discount['discounted_price'])) {
                    $forginal_price = $discount['initial_price'];
                    $fsale_price = $discount['discounted_price'];
                }
    			
    			if( $fsale_price > 0 && $product->is_on_sale() ){ 
    				$sale_off = 100 - ( ( $fsale_price/$forginal_price ) * 100 ); 
    				$html = '<div class="sale-off ' . esc_attr( ( sw_label_new() != '' ) ? 'has-newicon' : '' ) .'">';
    				$html .= '<span>-' . round( $sale_off ).'%</span>';
    				$html .= '<span class="text">' . esc_html__( 'Off', 'topdeal' ) . '</span>';
    				$html .= '</div>';
    				echo apply_filters( 'sw_label_sales', $html );
    			} 
    		}else{
    			echo '<div class="' . esc_attr( ( sw_label_new() != '' ) ? 'has-newicon' : '' ) .'">';
    			wc_get_template( 'single-product/sale-flash.php' );
    			echo '</div>';
    		}
    	}
    }
});